How do we automatically calculate Total Amount in doc type

[OmarJaber]

How to get the total qty in list item

frappe.ui.form.on("Child Table Doctype Name", "field_name", function (frm, cdt, cdn) { var total = 0; $.each(frm.doc.child_table_doctype_name || [], function (i, d) { total += flt(d.field_name); }); frm.set_value("total_weight", total); });